Finishing Tool Steel
While high-speed steels are very efficient with heavy cuts and high speeds they are incapable, at slow speeds and lighter cuts, of holding the keen edge necessary for obtaining a very smooth finish on certain articles.
Special steels have been produced for this purpose, known as finishing steels, which are capable of retaining a keen cutting edge for much longer periods than carbon steel used under similar conditions.
The usual type has the approximate composition:
C, 1.1 to 1.4; W, 4; Cr, 0.7 to 1.5; V, 0.3
After preheating to 650°C it is water hardened at 820-840°C and immediately tempered at 150-180°C.
Anneal at 750°C. Tungsten steels containing 1 to 5,5% and 1 to 1,3% carbon are used for twist drills, taps, milling cutters, drawing dies and also tools for rifling gun barrels, boring cylinders and expanding tubes, which require long continuous cutting without interruption for regrinding.
They are tempered at 200-230°C.
BEBON STEEL can provide Finishing Tool Steel immediately, if you need Finishing Tool Steel, please be free to contact us.
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